CN1062091C

CN1062091C - Non-groove static excitation synchronous generator

Info

Publication number: CN1062091C
Application number: CN97126126A
Authority: CN
Inventors: 肖振霞
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-31
Filing date: 1997-12-31
Publication date: 2001-02-14
Anticipated expiration: 2017-12-31
Also published as: CN1188341A

Abstract

The present invention relates to a non-groove iron core static magnetic field type generator. A stator of the generator comprises a stator bracket; uniformly distributed stator cores are arranged on two circular disks of the stator bracket; a stator coil is wound on each stator core; an excitation coil is wound on a hollow cylinder of the stator bracket. A rotor comprises a rotating shaft; a rotor core and two polar disks fixed with the rotor core are sheathed and fixed on the rotating shaft; the rotor core is positioned in the hollow cylinder; the two polar disks are positioned outside the two circular disks; salient poles are uniformly distributed on the outer circular surface of each polar disk. The non-groove static excitation synchronous generator has the characteristics of small volume, low iron loss, high generating efficiency, high material utilizing ratio, low cost and convenient maintenance.

Description

Non-groove static excitation synchronous generator

The present invention relates to a kind of slotless iron core fixed-field formula generator.

General generator, mainly comprise stator and rotor two large divisions, its stator core is to be overrided to form by circular silicon steel sheet insulated from each other, on each lamination, all need the some grooves of punching out, groove is embedded with stator coil, rotor comprises rotating shaft, is set with in the rotating shaft with silicon steel sheet or punching of the steel plate and the rotor magnetic pole that is overrided to form, is wound with magnetizing coil on the rotor magnetic pole.The generator of this traditional structure has following deficiency:

1, volume is big, iron loss is high, generating efficiency is low, because stator core and rotor magnetic pole all need jet-bedding, therefore used silicon steel sheet can not hang down the silicon silicon steel sheet and can only use with high silicon silicon steel sheet, low silicon silicon steel sheet permeability is low, magnetic flux density is little, and under the identical condition of generator power, the consumption of silicon steel sheet is big, thereby cause the volume of generator big, heaviness, the iron loss height, generating efficiency is low;

2, stock utilization is low, the cost height, when making stator core, be to determine circular chip in rectangular silicon steel sheet billot upper punch, the utilance of silicon steel sheet has only 60%, this is one of high factor of cost, two of the factor that cost is high is that stator coil is embedded in respectively in two grooves of the pitch in interval, the span of coil is big, and coil stretch out the outer part of notch can not cutting magnetic line, the part of cutting magnetic line does not account for the 20-40% of whole stator coil, that is the effective rate of utilization of enamelled wire is low, three of the factor that cost is high is to need the required precision height, expensive compund die, this is compound towards film rapid wear ring in frequent the use, and useful life is low;

3, maintenance difficult in threephase generator, the fault that a phase stator coil burns out often occurs, and in maintenance, mostly that all the other are intact two-phase stator coil is in company with a dismounting together mutually that is burnt out, and coiling was again both taken a lot of work, again waste;

4, carbon brush is easy to wear, and carbon brush is the requisite parts of generator, and in use, carbon brush very easily weares and teares, and has worn and torn to shut down replacing, and influence is used.

Publication number is no yoke, slotless, the axial magnetic circuit motor of CN1157502A, following technical characterictic is specifically disclosed: by separately independently n columnar iron core constitute stator with the winding that is wound on above the iron core, columnar iron core and top winding thereof are by support unit supporting location, rotating shaft, rotor is at the two ends of columnar iron core, and fastening with rotating shaft, on rotor,, between magnetic pole and the iron core working gas gap is arranged by a circle distribution m magnetic pole.Since the permeability magnetic material that the columnar iron core of this generator and rotor still adopt conventional electric generators to use, thereby permeability is low, the iron loss height, generating efficiency is low.

The purpose of this invention is to provide the non-groove static excitation synchronous generator that a kind of volume is little, generating efficiency is high.

This non-groove static excitation synchronous generator comprises stator and rotor, stator comprises the stator support that constitutes by hollow cylinder with two disks that the two ends of this hollow cylinder are connected as a single entity and make of non-magnet material, each disk is provided with and is the uniform breach of radiation-like, two disks corresponding each a stator iron core is housed in to breach, be wound with stator coil on each stator core, each stator coil connects by star or triangle, is wound with magnetizing coil on hollow cylinder; Rotor comprises rotating shaft, two utmost point dishes that in rotating shaft, overlap intrinsic rotor core and fix with two outer faces of this rotor core, rotor core is arranged in the hollow cylinder intracoelomic cavity, two utmost point dishes lay respectively at the outside of two disks, be evenly equipped with salient pole on the outer ring surface of each utmost point dish, between the coupling surface of salient pole and stator core, all leave the gap between utmost point dish and the disk and between rotor core and the hollow cylinder, it is characterized in that stator core and utmost point dish are to laminate with high silicon silicon steel sheet to make, rotor core is to roll with high silicon silicon steel strip.

Above-mentioned non-groove static excitation synchronous generator, the quantity of salient pole is 〉=2 integer, the quantity of stator core is 3 integral multiple of salient pole quantity, the central angle of each salient pole arc length is 2 times of central angle of the shared arc length of spacing of adjacent two salient poles, the coupling surface of salient pole and stator core is cambered surface or plane, cambered surface comprises cylindrical cambered surface and truncated cone-shaped cambered surface, the contact-making surface of two utmost point dishes and rotor core is the conical surface preferably, the angle of this conical surface and rotating shaft is 40 °-50 °, and the cross sectional shape of stator core is corresponding with the notch geometry on the disk.Be convenient and use that non-groove static excitation synchronous generator also comprises by bearing holder (housing, cover) and is contained in left end cap and right end cap in the rotating shaft, is connected to set bolt between left end cap and right end cap, two disks are separately fixed on left end cap and the right end cap.

Generator of the present invention, when work, at first in magnetizing coil, feed direct current, this direct current produces magnetic field, the trend of the magnetic line of force in magnetic field is S utmost point utmost point dish salient pole → S utmost point utmost point dish → rotor core → N utmost point utmost point dish → N utmost point utmost point dish salient pole → N utmost point utmost point dish salient pole and stator core coupling surface gap → stator core+stator coil → stator core and S utmost point utmost point dish salient pole coupling surface gap → S utmost point utmost point dish salient pole, when prime mover drives the rotating shaft high speed rotating, rotor core and two utmost point dishes be high speed rotating thereupon also, utmost point dish whenever rotates a circle, the magnetic line of force quantity of being passed through in the stator coil on each stator core is periodic variation, promptly when the centre of corresponding each salient pole of stator core, the magnetic line of force that passes through in the stator coil is maximum, the centre of left and right deviation salient pole, the magnetic line of force that passes through in the stator coil reduces, depart from long more, the magnetic line of force reduces many more, when stator core during corresponding to the space between the salient pole, the no magnetic line of force passes through in the stator coil, because the magnetic line of force that passes through in each stator coil is close, dredge, do not have, dredge, close periodic variation, be equivalent to periodically cutting magnetic line of stator coil, so just on each stator coil, produce induced electromotive force, each stator coil connects by star or triangle, just can power to the load.

This non-groove static excitation synchronous generator has following characteristics:

1, volume is little, iron loss is low, generating efficiency is high, because stator core and rotor core do not need jet-bedding, thereby can make of high silicon silicon steel sheet, the permeability of high silicon silicon steel sheet is 2.5 times of low silicon silicon steel sheet, under the identical condition of magnetic flux density, stator core and the rotor core volume made of high silicon silicon steel sheet are just little 2.5 times than what make of low silicon, and weight also alleviates accordingly, its iron loss is low 3-5 times, and the efficient of generator is brought up to 90-95% by the 80-85% of traditional structure;

2, the stock utilization height, manufacturing process is simple, cost is low, because stator core is the strip lamination, when making, almost there are not leftover bits, the utilance of material can reach 99%, because stator coil is directly on the little stator core of volume, no span, and cutting magnetic lines all, thereby the used enamelled wire of stator coil is few, compares with the generator of traditional structure, can save the also corresponding reduction of its copper loss of copper 40-60%, because stator core and rotor core do not need jet-bedding, thus saved the compund die that involves great expense and make in stamping procedure, the machine work means are simplified, from the above mentioned, the cost of this generator can reduce significantly;

3, easy to maintenance, because each stator coil is on stator core separately, not cross-laminated each other, this just greatly facilitates maintenance, during maintenance, only needs to change the stator coil that damages, and all the other intact stator coils use as usual, have saved maintenance cost;

4, saved carbon brush, owing to adopt quiet excitatory structure, thus saved the carbon brush that very easily weares and teares, stopped the phenomenon generation that shutdown replacing carbon brush, influence are used;

5, simplified cooling device,,, can save cooling device,, simplified cooling device, guaranteed the reliability of motor rotation high-rating generator to small generator owing to adopted high silicon silicon steel sheet and quiet excitatory structure.

Embodiments of the invention are described with reference to the accompanying drawings.

In the accompanying drawings, Fig. 1 is the front view of non-groove static excitation synchronous generator embodiment, Fig. 2 is the left view of figure, Fig. 3 is the front view with the non-groove static excitation synchronous generator of left and right end cap, Fig. 4 is that the coupling surface of salient pole and stator core is the schematic diagram of truncated cone-shaped cambered surface, Fig. 5 is that the coupling surface of salient pole and stator core is the schematic diagram of cylindrical lonely face, and Fig. 6 is that the coupling surface of salient pole and stator core is the schematic diagram on plane.

In the present embodiment, non-groove static excitation synchronous generator comprises stator and rotor, stator comprises by hollow cylinder 1 and two stator supports that disk 2 constitutes being connected as a single entity with the two ends of this hollow cylinder 1, stator support non-magnet material aluminium, plastics or bakelite are made, each disk 2 is provided with and is 9 uniform square breach of radiation-like, in two disks, 2 corresponding each square shaped breach, stator core 3 is housed, the high silicon silicon steel sheet of stator core 3 usefulness laminates to be made, its cross sectional shape is corresponding with the square breach of disk 2, be wound with stator coil 4 on each stator core 3, each stator coil 4 connects by star or triangle, on hollow cylinder 1, be wound with magnetizing coil 5, rotor comprises rotating shaft 6, the rotor core 7 that cover intrinsic usefulness high silicon silicon steel strip rolls in rotating shaft 6 and fix and laminate two utmost point dishes 8 making with two outer ends of this rotor core 7 with high silicon silicon steel sheet, the contact-making surface of two utmost point dishes 8 and rotor core 7 is the conical surface preferably, the angle of this conical surface and rotating shaft 6 is 40 °-50 °, fixed form between utmost point dish 8 and the rotor core 1 can be used fixed screw, rotor core 7 is arranged in hollow cylinder 1 inner chamber, two utmost point dishes 8 lay respectively at the outside of two disks 2, be evenly equipped with 3 salient poles 9 on the outer ring surface of each utmost point dish 8, the central angle of each salient pole 9 arc length is 2 times of central angle of the shared arc length of spacing of adjacent two salient poles 9, salient pole 9 can be a cambered surface with the coupling surface of stator core 3, it also can be the plane, lonely face comprises cylindrical lonely face and truncated cone-shaped cambered surface, gap between the coupling surface of salient pole 9 and stator core 3 is 0.15-0.30mm, gap between utmost point dish 8 and the disk 2 is 0.30-0.50mm, gap between rotor core 7 and the hollow cylinder 1 is 0.25-1.20mm, use for convenient, this generator also comprises by bearing 10 and is sleeved on left end cap 11 and right end cap 12 in the rotating shaft 6, be separately fixed on left end cap 11 and the right end cap 12 being connected to set bolt 13, two disks 2 between left end cap 11 and the right end cap 12.

In industrial production, the concrete number of salient pole 9 on the utmost point dish 8, under satisfied 〉=2 condition, its principle of determining is: the rotating speed that is determined generator by the rotating speed of prime mover, by the rotating speed of generator decision stator core bar number, the merchant that the stator core bar is counted ÷ 3 is the number of salient pole.

Claims

A kind of non-groove static excitation synchronous generator, comprise stator and rotor, stator comprises the stator support that constitutes by hollow cylinder (1) with two disks (2) that the two ends of this hollow cylinder (1) are connected as a single entity and make of non-magnet material, each disk (2) is provided with and is the uniform breach of radiation-like, two disks corresponding each a stator iron core (3) is housed in to breach, be wound with stator coil (4) on each stator core (3), each stator coil (4) connects by star or triangle, on hollow cylinder (1), be wound with magnetizing coil (5), rotor comprises rotating shaft (6), go up two utmost point dishes (8) that overlap intrinsic rotor core (7) and fix with two outer faces of this rotor core (7) in rotating shaft (6), rotor core (7) is arranged in hollow cylinder (1) inner chamber, two utmost point dishes (8) lay respectively at the outside of two disks (2), be evenly equipped with salient pole (9) on the outer ring surface of each utmost point dish (8), between the coupling surface of salient pole (9) and stator core (3), all leave the gap between utmost point dish (8) and the disk (2) and between rotor core (7) and the hollow cylinder (1), it is characterized in that stator core (3) and utmost point dish (8) are to laminate with high silicon silicon steel sheet to make, rotor core (2) is to roll with high silicon silicon steel strip.